It still needs to be passed by the House of Representatives and this is not a given at this point. They have already voted "no" on it earlier this week and this Senate version will possibly attract some and disillusion others.

Don't panic, big stockholder. The stock prices supposed to jump up and down. When the crisis will be over, your stocks will go up again (unless your company won't survive or you'll freak out prematurely and sell your stocks cheap)